Fair Value Measurements and the Fair Value Option - Schedule of Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unconsolidated investments	$ 1,914.0	$ 1,927.0
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unconsolidated investments	1,914.0	1,927.0
Total	1,905.9	1,903.3
Recurring | Currency Derivative Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net currency derivative contracts	(8.1)	(23.7)
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unconsolidated investments	0.0	0.0
Total	0.0	0.0
Recurring | Level 1 | Currency Derivative Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net currency derivative contracts	0.0	0.0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unconsolidated investments	0.0	0.0
Total	(8.1)	(23.7)
Recurring | Level 2 | Currency Derivative Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net currency derivative contracts	(8.1)	(23.7)
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unconsolidated investments	1,914.0	1,927.0
Total	1,914.0	1,927.0
Recurring | Level 3 | Currency Derivative Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net currency derivative contracts	$ 0.0	$ 0.0